Thompson Greenspon
Employee benefit plan audit practice profile, built from plan year 2024 Form 5500 filings.
Last updated · Source data: plan year 2024 Form 5500 filings
How many 401(k) plans does Thompson Greenspon audit?
Thompson Greenspon was the independent auditor for 17 retirement plan filings in plan year 2024, with clients in 6 states and territories — the #591 practice nationally by volume.
Practice at a glance
| Measure | Value |
|---|---|
| Firm EIN (as filed) | 54-1029635 |
| Retirement plan audits (401(k), 403(b), pension) | 17 |
| All audited filings (incl. welfare plans) | 17 |
| States and territories with clients | 6 |
| National rank by retirement plan volume | #591 of 3,956 |
| National rank, all audited filings (league-table basis) | #602 of 4,052 |
| Average client size (participants) | 825 |
| Largest client (participants) | 7,617 |
Rankings derived from U.S. Department of Labor Form 5500 filings, plan year 2024. Read the full methodology.
Where does Thompson Greenspon audit plans?
| State | Plans audited | Share of practice |
|---|---|---|
| Virginia | 12 | 70.6% |
| California | 1 | 5.9% |
| Washington, D.C. | 1 | 5.9% |
| Maryland | 1 | 5.9% |
| North Carolina | 1 | 5.9% |
| Texas | 1 | 5.9% |
Largest concentration: Virginia (12 plans). State reflects the plan sponsor’s address, not the firm’s office locations.
What audit opinions does Thompson Greenspon issue?
| Opinion type | Filings | Share |
|---|---|---|
| Unmodified (clean) | 17 | 100.0% |
| Qualified | 0 | 0.0% |
| Disclaimer | 0 | 0.0% |
| Adverse | 0 | 0.0% |
As coded on Schedule H. A disclaimer here usually reflects the legacy limited-scope reporting convention (now the ERISA Section 103(a)(3)(C) election), not a failed audit — see the methodology.
Largest plans audited by Thompson Greenspon
| Plan sponsor | State | Participants |
|---|---|---|
| Swissport North America Holdings, Inc. | NC | 7,617 |
| Hallmark Aviation Services, LP | CA | 1,743 |
| William A. Hazel, Inc. | VA | 747 |
| Pave America Interco, LLC | VA | 675 |
| Kellogg, Hansen, Todd, Figel & Frederick, P.L.L.C. | DC | 375 |
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About this profile
This page is generated from public U.S. Department of Labor Form 5500 filings in which Thompson Greenspon (EIN 54-1029635) is named as the plan’s independent qualified public accountant. Thompson Greenspon did not supply, review, or endorse this information, and inclusion is not a recommendation. Filing data can contain sponsor-entered errors; corrections are welcome via the about page.